Tag 'isced:level = 2;3'

Value histogram for key 'ref'

• 1: 09K01b
• 1: 03K01b
• 1: 03Y13
• 1: 02Y03
• 1: 06Y04
• 1: 03Y14b
• 1: 03Y13b
• 1: 06Y02
• 1: 09Y03